APA citiranje

Langley, C. E. (1941). Combined Intra-uterine and Extra-uterine Pregnancy.

Citação norma Chicago

Langley, C. E. Combined Intra-uterine and Extra-uterine Pregnancy. 1941.

MLA citiranje

Langley, C. E. Combined Intra-uterine and Extra-uterine Pregnancy. 1941.

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